C#如何在系统上运行的应用程序中更改用户上下文

时间:2017-10-25 22:50:23

标签: c# security system

我有一个与系统用户一起运行的应用程序。我需要应用程序中的一些代码在用户上下文(用户自己)上运行。例如,我需要在用户上下文中使用webclient,因为我的防火墙识别用户名,但后来我需要运行其他一些代码。在系统上下文中运行exe(使用系统用户),因为我需要权限。

有没有办法做到这一点?

感谢!!!

1 个答案:

答案 0 :(得分:0)

我已使用此代码来模拟某些操作

using System;
using System.ComponentModel;
using System.Runtime.InteropServices;
using System.Security.Principal;
using NLog;
namespace Core.Impersonation
{
    public class ImpersonatedUser : IDisposable
    {
        private static Logger logger = LogManager.GetCurrentClassLogger();
        IntPtr userHandle;
        WindowsImpersonationContext impersonationContext;
        public ImpersonatedUser(string user, string domain, string password)
        {
            logger.Debug("Impersonating user: " + domain + @"\" + user);
            userHandle = IntPtr.Zero;
            bool loggedOn = LogonUser(
                user,
                domain,
                password,
                LogonType.Interactive,
                LogonProvider.Default,
                out userHandle);

            if (!loggedOn)
                throw new Win32Exception(Marshal.GetLastWin32Error());

            // Begin impersonating the user
            impersonationContext = WindowsIdentity.Impersonate(userHandle);
        }

        public void Dispose()
        {
            if (userHandle != IntPtr.Zero)
            {
                CloseHandle(userHandle);
                userHandle = IntPtr.Zero;
                impersonationContext.Undo();
                logger.Debug("Finished Impersonating user");
            }
        }

        [DllImport("advapi32.dll", SetLastError = true)]
        static extern bool LogonUser(
            string lpszUsername,
            string lpszDomain,
            string lpszPassword,
            LogonType dwLogonType,
            LogonProvider dwLogonProvider,
            out IntPtr phToken
            );

        [DllImport("kernel32.dll", SetLastError = true)]
        static extern bool CloseHandle(IntPtr hHandle);

        enum LogonType : int
        {
            Interactive = 2,
            Network = 3,
            Batch = 4,
            Service = 5,
            NetworkCleartext = 8,
            NewCredentials = 9,
        }

        enum LogonProvider : int
        {
            Default = 0,
        }
    }
}

然后用法:

using (var i = new ImpersonatedUser("someLogin", "someDomain", "thePassword"))
{
    var u = System.Environment.UserName;
}